Download PONDS Version 2.26 Users Manual.

PONDS USER MANUAL
ii)
4-4
The effective perimeter of the pond "P" must be equal to the perimeter of the
equivalent rectangle (i.e., 2L + 2W). In mathematical terms,
(2)
Note that "P" is the effective perimeter of the pond which may or may not be equal
to the actual perimeter of the pond. The user should review the shape of the pond
and draw an imaginary line around the pond through which ground water will flow
unencumbered away from the pond. The length of this line is the effective perimeter
"P". See figure below for an example.
Since h, V, and P are known, equations (1) and (2) above may be solved
simultaneously for L and W as follows:
and
Units in the above equation must, of course, be consistent.
August 7, 1995